“…Motivations for SV are often explained as reflecting the stages of cognitive, affect-motor, moral and ethical development (Rosenthal & Doherty, 1984). Therefore in populations not 'at high' risk for violence, SV has been reported to result from a range of issues in which siblings are forced to negotiate, practice, and develop their conflict resolution skills, including caretaking responsibilities, division of labour, shared resources, property disputes, perceived favouritism, and power issues (Caffaro & ConnCaffaro, 1998;Felson, 1983;Raffaelli, 1992;Wiehe, 1997). Evidence from the evolutionary literature also suggests that the inherent power imbalance and non-elective nature of sibling relationships plus demand for resources during this period, may prime siblings for violent conflict (Black, Mock & Parker, 1997).…”